If you want even faster rendering from already fast Gecko-based browsers, LinuxOrbit has a rendering speed tweak online that can help.

I tried this with Chimera and it worked very well, although I still prefer Safari. Please change Mozilla paths to reflect your own.

[Editor's note: The page mentions that this changes the delay before rendering begins, so it doesn't actually increase rendering speed. But if you have a fast connection, the result may be the same. I have not tested this one myself.]